So, you're not talking about selling just the Transceiver to hook to a
TNC, but an integrated Transceiver/TNC unit that interfaces via USB to a
PC ala the OTUSB? Sounds nice. Be nicer with Bluetooth so it could be
wires-free!
Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32
PS. Still hoping for that single package Tracker/Digi with Bluetooth
serial for hooking to a full-featured client and/or IGate when
necessary/desired. Of course, it would have to be band and frequency
agile and... Hey, I can dream, can't I?
On 2/15/2012 1:40 PM, Scott Miller wrote:
> Yes, when I said the OTUSB uses them transparently, I mean that they
> behave exactly like they would for normal APRS, including KISS mode.
> Buffering is still limited, but that will be changing - the OTUSB and
> T3 both have RAM available for a larger outgoing packet buffer, but
> the code needs some major changes and a lot of testing to make sure it
> can handle transmitting continuously while it still does everything
> else simultaneously.
>> The current prototype boards only have a USB mini-B connector and a
> 6-pin wafer connector for a GPS receiver, and no regular RS-232 serial
> ports. The PA needs a 12v supply, so they still need an external
> power source aside from USB.
>> Scott
> N1VG
>> On 2/15/2012 10:29 AM, Bradley Haney wrote:
>> will we be able to possbile use these in a KISS mode?
>>>> On Wed, Feb 15, 2012 at 12:12 PM, Scott Miller <scott at opentrac.org>> <mailto:scott at opentrac.org>> wrote:
>>>> Hi all,
>>>> I've been playing with some half-watt 70 cm data transceivers
>> lately. I'm currently testing at 434 MHz, and with the standard
>> crystal they should cover about 430 to 439 MHz. I'm not really
>> familiar with the 70 cm band plan and figured I'd check here and see
>> if people consider that a reasonable part of the band to be
>> working in.
>>>> I've got another small batch of them coming soon and might start
>> selling a board based around it for people who want to experiment.
>> Right now I'm using an OpenTracker USB variant. It's currently
>> running at 4800 baud with some basic FEC - a (7,4) Hamming code with
>> interleaving, not fancy but easy to implement. The transceivers
>> will go up to 115200 bps. When I have time, I'll see if they can be
>> made to inter-operate with G3RUH TNCs, but for now I'm going to
>> assume that won't work.
>>>> The really attractive part is that they're cheap - retail price
>> should be not more than 1/3 what we're selling the half-watt
>> transmit-only 2-meter modules from SRB for, and they're about the
>> same size.
>>>> There are still some bugs to be worked out, but the OpenTracker USB
>> (and by extension the Tracker3) will presently work transparently
>> with these radios, doing APRS at 4800 baud with error correction.
>> I'll be working some more on them to improve mesh routing and
>> channel access control to try to make them more suitable than
>> vanilla APRS for short range, high rate tracking applications.
>>>> Scott
>> N1VG
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